Dish washing machine



Jan. 3, 1961 I M, c, AUBERT 2,967,024

DISH WASHING MACHINE Filed March 23, 1959 F INVENTOR United StatesPatent msn WASHING MACHINE jlVlich'eljClaude Aubert, Geneva,Switzerland, assignor to ';Frame vS.A., Fribourg, Switzerland, '21corporation of *SWitzerl-and Filed Mar. '23, 1959, Ser.-No. ;801,362Claims priority, application Switzerland Apr l, 195s 8 Claims. (Cl.239-4261) There exist dish washing machines ;which comprise a conduithaving an oscillating free end and another: end

"fitted on a support with a vertical shaft andmounted on passage formingthe above-mentioned'conduit, a tipat the lower end of the-said conduit,andmeans-urgingthe said body to rotate about :its own axiswhen the said:passage is traversed by water under pressure in that there is providedo-nthe base membera conical seat for receiving the tip and bringing thewater underpressure 1 to the said conduit: and in that there is provideda ring :carried by the base member and forming a lateral supportand arunway for the oscillating body, to maintain the said body inclined, thenatural rotation of the oscillating body under the action of the watercausing it to rollon the said lateral support, whereas the axis of thesaid bodydescribes a cone.

The attached drawing shows, by way of-example, .an embodiment of thedish washing machine according to the present invention.

Figure 1 is a view'in partial vertical section.

Figure 2 is a detail view in partial section along 2-2 of Fig. 1.

The machine shown comprises a fixed support 40, with a vertical axis,secured by screwing on a base member not shown and itself securedrelative to the structure of the machine. The said support is traversedaxially by a passage 41 for the supply of water under pressure. At theupper end of the said passage 41, there is disposed in the support 40 amember 42, for example of synthetic material similar to rubber and knownin the trade under the name of Teflon. The said member constitutes aconical seat, seen at 43.

A metallic member of annular shape 44 is disposed at a certain distanceabove the support 40 to which it is connected by metallic arms 45,preferably slightly elastic. The inner part 46 of the annular member 44thins out, as is to be seen in Fig. 1.

An oscillating body 47 having a form of revolution is traversedlongitudinally by a longitudinal passage 48. The lower end of the saidconduit forms a tip 49 with a spherical head resting on the conical seat43. The conduit 48 thus communicates with the water supply passage 41;the spherical shape of the tip 49 and the conical one of the seat 42ensure sufficient watertightness between the said two elements, so thatpractically all the water entering at 41 must pass into 48.

The oscillating body 47 rests freely against the inner part 46 of theannular member 44, so that its axis is inclined to a certain extentrelative to the vertical, as is seen in the drawing. The upper part ofthe body 47 2,967,024 Patented Jan. 3, 1961 ice is constituted by a cap'50 having ;an outer annular groove 51-provided to-cooperate with thepart 46. The 'said'groove has a lower part 52 ofconical shape wideningdownwardlyand by means ofwhich the body 47, 50 bears ,against' the ring44.

The-cap*50"is pierced with a certain number-(four in theexample'shown-)--of-outletpassages 53, 54,55, 56,-by which thelongitudinal passage *48 communicates with the outside. It will be seenthat the said outlet passages are unequally-inclined relatively to theaxis of the body 47,550. The axis of the passage-53 is situated in aradial plane-of the body 47, 50. The passages 54, 55, '56 are disposedtangentially relatively to the longitudinal passage 48, as see'n-in Fig.13, so that each of them constitutes 'an arm of a'hydraulic Whirl.

, The operation of the machine shown in the following: The body 47, "50being in place, as is to be seen in Fig. 1, when the water underpressure arrives by 41, it

enters into 48, and thenleaves the body by the outlet passages 53,54,55, '56. 'The water entering into those of the outlet passages whichform the arms of the hydraulic whirl, urges, through well-known reactioneffect,

the body 47, 50 to rotate about its own axis, exactly in 'the manner ofa hydraulic jwhirl. Nothing prevents this rotational movement and thebody 47, 50 then rolls on the part '46'of thering 44, as a result of thesaid rotation -56 is then projected into the part of the inside of themachine where are to befound'the table utensils. As a result of the saidrolling motion of the body 47, 'SiL-the axis of the said body'describesa cone, and as a result of the different inclinations of the outletpassages relative to the axis of the said body, a sweeping of all theregion where are to be found the table utensils to be washed iseffected. The tangential disposition of certain of the outlet passagesrelative to the longitudinal passage '48 has for efiect that-the wateradopts, inside the said outlet passages, awhirling movementand issuesfrom the said passages in the form'of a divergingzlayer. --w.aterwill;issu e from 53. in theformof a, jet, whereas it Thus,

will issue from 54, 55,56 in the form of more or less atomizeddiverginglayers. The inclination of the conduit 53 will be chosen suchthat during the conical oscillating movement of the body 47, 50, thewater which issues from said passages will douse relatively heavy tableutensils, such as plates, whereas the water issuing from the otheroutlet passages will be directed towards lighter and more fragileutensils, such as cups or saucers, for example.

The angle of the apex of the cone 52 is provided larger than the angleof the apex of the cone described by the axis of the body 47, 50. Theresult of this disposition is that, during the rotation of the saidbody, the vertical component of the centrifugal force of the body 47, 50acting on the part 46 of the ring 44 will be directed downwards and isconsequently opposed to the axis of the said body approaching thevertical and abandoning contact with the ring. The said conical surface52 thus acts in cooperation with 46 in order to maintain the body 47, 50in contact with the ring 44 and ensure satisfactory watertightnessbetween 42 and 49. The said body is thus obliged to roll on the part 46.The weight of said body is moreover adequately chosen so as to ensuresatisfactory wate'rtightness between 42 and 49, when starting up. To sumup, the vertical component, above mentioned, of the centrifugalforce,adds its action to that 3 of the weight, in order to maintain the saidwatertightness.

A certain elasticity of the arms 45 is advantageous in order to permitof absorbing, at least to a certain extent, the effect of the inertiaforces transmitted to the machine under the action of the movementdescribed of the mass 47, 50. To this end, another elastic mounting ofthe ring 44 on the machine might be adopted. I

The ratio between the radii of the contact circles of the body 47, 50and the-ring 44, will be advantageously chosen other than a whole numberor a simple fraction. In fact, if one considers any point on the axis ofone of the outlet passages 53, S4, 55, 56, it describes a certain curvesituated on a spherical surface and similar to a hypocycloid. If theratio under consideration is a whole number or a simple fraction, thismeans that the said curve closes on itself and repeats itself bysuperposition, after a small number of conical oscillations of the body47, 50 about the vertical axis of the system. In order to obtain adistribution as homogeneous as possible of the water in the space, andconsequently a good washing, it is necessary that the said ratio be suchthat the curve only closes on itself after a number of oscillations ashigh as possible of the body 47, 50. A ratio equivalent to an irrationalnumber would give a curve which would never close.

It will be seen that the described construction ofiers the followingadvantages: The body 47, 50 may be removed and set up without anymechanical operation, which is useful for cleaning and to ensureinstantaneous interchangeability. Indeed, it may be interesting todispose of a set of bodies such as 47, 50 differing one with the otherby the disposition of the outlet passages, each of said bodies producinga difierent washing. Thus, one such body could produceintense andconcentrated jets, for washing kitchen utensils heavy and difficult towash, another such as described above and a third only producingatomized jets, in order to clean articles which are delicate and easilycleaned, such as glasses.

What I claim is:

1. A washing machine spray producing apparatus, comprising a base havinga water supply conduit therethrough, an oscillating body having aconduit therethrough, a tip member having an axial conduit therethroughand a receiving member having a conical recess therein with an axialbore therethrough opening into the apex of the conical recess, saidconical recess receiving said tip member therein, one of said membersbeing on said base and the other member being on said oscillating body,and a ring on said base around said oscillating body against which saidoscillating body rests in an inclined position, and means on saidoscillating body over the end of the conduit therethrough at the end ofsaid oscillating body remote from said base for directing liquidtherethrough for causing said oscillating body to roll on said ring,whereby the axis of said oscillating body describes a cone.

2. Apparatus according to claim 1, characterized in that the oscillatingbody has an outer annular groove provided to cooperate with theabove-mentioned ring and ensure that the said body be held in contactwith it.

3. Apparatus according to claim 2, characterized in that the groove hasa conically shaped lower part widening downwards and through which thesaid body bears against the above-mentioned ring, the angle at the apexof the said cone being larger than the angle at the apex of the conedescribed by the axis of the said body.

4. Apparatus according to claim 1, in which said means has a pluralityof outlet passages by which the said conduit through said oscillatingbody communicates with the outside, the said outlet passages beingunequally inclined, relatively to the axis of the oscillating body, soas to ensure an extensive sweeping by the water which issues from thesaid body.

5. Apparatus according to claim 1, in which said means has at least oneoutlet passage disposed substantially tangentially to the periphery ofthe cone described by said body, so that the water therein assumes awhirling movement and in the form of a diverging layer.

6. Apparatus according to claim 1, characterized in that the ratiobetween the contact radii of the oscillating body and the ring is anumber other than a whole and a simple fraction.

7. Apparatus according to claim 4, characterized in thatat least one ofthe said outlet passages is arranged substantially tangentially to theperiphery of the cone described by said body to form the arm of ahydraulic whirl.

8. Apparatus according to claim 1, characterized in that the ring isconnected to the structure through the agency of elastic means.

References Cited in the file of this patent UNITED STATES PATENTSlama-ante

